Installation
CHIMNEY WEIGHT
Chimney weight is given in pounds per foot of chimney for each diameter.
It is important to know the weight of the chimney section for chimney
support or guiding. Chimney weight (table 8) along with maximum
chimney height (table 6) are necessary to calculate the proper anchor
strength needed with wall supports (WS), Anchor Plate (AP) supports
and Suspension Bands (SB).
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
7
Example: Model DIS, 6” diameter section of 25 feet in length from table 8,
weight in lb/ft = 8. Total weight 8 x 25 = 200 lbs
CHIMNEY GUYING AND BRACING
1. Proper guying and bracing is essential for part of the chimney that
extends above the roof or parapet wall. The chimney at this point is
subject to wind conditions and needs special attention for proper
stabilization.
2. If the stack above the roof does not exceed dimension H, no special
guying or bracing is required. However, to protect the flashing from
lateral movement, a guide must be installed at the roof level. See figure
7).
3. For stack height above the roof that needs guying or bracing, a support,
a small length and a expansion length must be installed near the roof
level to absorb the thermal expansion and minimise this effect on the
guy wires or brace.
4. When using guy wire, the cable must be slightly slack or loose to allow
thermal expansion.
5. When using rigid bracing, the maximum vertical height between sup-
ports must be reduced to 5’ to compensate thermal expansion.
Figure 7 - Maximum freestanding chimney height
* If Dimension “H” exceeds the
value in table 7, use bracing or
cable guying to stabilize chim-
ney section above the roof. See
notes 3, 4, 5 and figure 8.
Figure 8 - Chimney height with rigid bracing or guying option
See table 7 for “H” dimensions
Support
Maximum Height
See table
H*
Guide
No guying or bracing required
Maximum
height -
See table 6
Support
Expansion Length
Guide
Support
* Cables and roof anchors
designed for 30 lb. per
sq. ft. force on chimney
projected area.
Brace
Guy Cable * tensioners and
roof anchors * (by others)
H
H
5’ MAX
CHIMNEY WEIGHT IN LB/FT
Inside diameter Model DIS Model DAS
5 7 4
6 8 5
8 10 6
10 12 8
12 14 9
14 16 10
16 18 12
18 20 13
20 22 14
22 24 15
24 28 19
26 30 20
28 32 21
30 34 23
32 36 24
34 38 25
36 40 27
Table 8